Navigation & Radio at Tri-Cities Regional TN/VA Airport
US
TRI
/
KTRI
Radio Frequencies
15
Navigation Aids
4
Radio Frequencies
APP
119.250 MHz
APP
ID: 61395
Ref: 3928
APP
119.250 MHz
APP
ID: 61395
Ref: 3928
ATIS
118.250 MHz
ATIS
ID: 61396
Ref: 3928
ATIS
118.250 MHz
ATIS
ID: 61396
Ref: 3928
CTAF
119.500 MHz
CTAF
ID: 61397
Ref: 3928
DEP
125.500 MHz
DEP
ID: 61398
Ref: 3928
DEP
125.500 MHz
DEP
ID: 61398
Ref: 3928
GND
121.700 MHz
GND
ID: 61399
Ref: 3928
GND
121.700 MHz
GND
ID: 61399
Ref: 3928
RDO
122.200 MHz
NASHVILLE RDO
ID: 61400
Ref: 3928
RDO
122.200 MHz
NASHVILLE RDO
ID: 61400
Ref: 3928
TWR
119.500 MHz
TWR
ID: 61401
Ref: 3928
TWR
119.500 MHz
TWR
ID: 61401
Ref: 3928
UNIC
122.950 MHz
UNICOM
ID: 61402
Ref: 3928
UNIC
122.950 MHz
UNICOM
ID: 61402
Ref: 3928
Navigation Aids
BO
NDB
0.221 MHz
Booie
Location
Latitude:
36.398602°
Longitude:
-82.496201°
Elevation:
1600 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-6.047°
ID: 86239
BO
NDB
0.221 MHz
Booie
Location
Latitude:
36.398602°
Longitude:
-82.496201°
Elevation:
1600 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-6.047°
ID: 86239
TR
NDB
0.299 MHz
Mocca
Location
Latitude:
36.555401°
Longitude:
-82.318001°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-6.150°
ID: 94572
TR
NDB
0.299 MHz
Mocca
Location
Latitude:
36.555401°
Longitude:
-82.318001°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-6.150°
ID: 94572
Understanding Airport Navigation & Radio Communications
Radio Frequencies in Aviation
Radio frequencies are essential for communication between aircraft, air traffic control, and ground services. Here are the common types:
Common Frequency Types
- ATIS (Automatic Terminal Information Service): Continuous broadcast of airport conditions
- Ground: Communication with ground control for taxi instructions
- Tower: Communication with air traffic control tower
- Approach/Departure: Handling arriving and departing aircraft
- UNICOM/CTAF: Used at airports without control towers
Frequency Ranges
- VHF Band: 118.000 - 136.975 MHz
- Emergency: 121.5 MHz (International emergency frequency)
- Ground Control: Usually 121.6 - 121.9 MHz
- ATIS: Usually 108 - 118 MHz
- UNICOM: Typically 122.8 MHz (uncontrolled airports)
Navigation Aids (Navaids)
Navigation aids are electronic systems that help pilots determine their position and navigate safely. Here are the main types:
Types of Navaids
- VOR (VHF Omnidirectional Range): Provides bearing information to aircraft
- DME (Distance Measuring Equipment): Gives slant-range distance to the station
- NDB (Non-Directional Beacon): Simple radio beacon for basic navigation
- TACAN (Tactical Air Navigation): Military version of VOR/DME
- VORTAC: Combined VOR and TACAN facility
Usage Types & Power Levels
- HI: High altitude navigation
- LO: Low altitude navigation
- TERM: Terminal area navigation
- Power Levels: HIGH, MEDIUM, LOW (affects range)
- RNAV: Area navigation capability
Important Notes
- Always verify frequencies and navaid status in current aviation publications
- Magnetic variation changes over time and should be considered when using navaids
- Some navaids may be out of service or have limited hours of operation
- DME distances are slant-range and may differ from actual ground distance